Litharachnium eupilium


Classification: rads_cenozoic -> Theoperidae -> Acropyramiidae -> Litharachnium -> Litharachnium eupilium
Sister taxa: L. eupilium, L. tentorium, L. sp.

Taxonomy

Citation: Litharachnium eupilium (Haeckel 1887) Takahashi 1991
Rank: species
Basionym: Litharachnium eupilium

Catalog entries: Sethophormis eupilium

Original description: Cephalis very small, hemispherical, hyaline, without pores. Thorax flatly pyramidal, with nine concave, triangular faces and nine little curved, stout, radial beams. Between these are interpolated numerous incomplete secondary beams, which are absent in the apical part of the thorax. The radial beams being connected by numerous (thirty to forty or more) horizontal, ring-like threads, a delicate, arachnoidal network with small, quadrangular pores is produced. Peristome nine-angled, with a peculiar vertical gallery, composed of four horizontal, parallel, nine-angled rings, which are connected by numerous vertical, parallel bars, therefore with three transverse rows of square pores. This peculiar species is very different from the preceding and may represent a separate genus, Craspedilium.

Cephalis 100µm diameter, thorax 100µm long, 250µm broad.
Remarks on original description: Haeckel listed Sethophormis eupilium under the subgeneric name Enneaphormis, but did not include the subgeneric name in the species name.
The "preceding species" refers to Sethophormis enneactis in Haeckel, 1887a.]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"

Plot of occurrence data:

References:

Missing or ambiguous references: Takahashi 1991 taxonomy


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Litharachnium eupilium compiled by the radiolaria@mikrotax project team viewed: 27-2-2021

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Short stable page link: https://mikrotax.org/radiolaria/index.php?id=204464 Go to Archive.is to create a permanent copy of this page - citation notes



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